HyperSense,
Thanks for sharing your experiences.
Meditation is a very broad subject, and in my opinion, a much misunderstood topic even by those who call themselves 'experts' on it. One of the reasons is that it is so useful for such a broad range of things and most 'experts' only master some aspects of its uses. The best way to advise a person meditating, is to understand their motive for doing so - their goal.
If you could share "why" you meditate, and go deeper on the why until you can't explain any further, it would help understand your experiences better and also for others in how to assist you in your goal. Meditation is simply to broad to effectively support you without such insight.
There are also some observations that are very common when it comes to the specific type of meditation I assume you are doing (there are gazillion different ways to meditate, which would suit different goals better).
These observations include:
1. Activation and stimulation of non-corporeal senses and bodies - one way of putting it is that your 'spiritual senses' and/or your non-physical bodies (we have a few) are becoming more accessible to your physical body and your physically-based awareness. No matter your goal, these develop as a side-effect, and become more accessible, easier to sense, to use. When you switch on a lightbulb, it gives off heat and light. Your eyes may be closed so you don't see the light, but if u put your hand on it, it burns because of the heat. You might be sensing partial stimulus from your 'other senses' and/or 'other bodies' but don't know what to do with it or how to open more gateways/senses to make more sense of what is going on (no pun intended), like feeling the heat but not seeing the light. When meditating, try expanding your awareness / attention to other senses, or even other forms of sensing. Try "smelling colors" or "hearing images", e.g. try "smelling the taste" or "seeing visually" the pulsating energy you experience - if this sounds too strange, well, the point is to open your mind to receive more 'sensory input' by becoming aware of other possible ways of 'sensing' things. Its a way of exploring and understanding things first-hand. Whatever happens - don't judge it, just observe
2. Activation and stimulation of corporeal / physical senses and your body. It is well known that most forms of meditation have a transforming effect on our biology. Your actual biology undergoes changes. Pay attention to your body - do you feel different about tastes in food, or have more energy, perhaps better ability to concentrate when not neglecting routine meditation? Some sensations you experience might repeat until something in your body has changed sufficiently for those non-corporeal changes to progress even further. e.g. renewing the cells in your nervous system to handle the more intense forms of energy that will be going through it as you progress. Only when ready, might the sensations change or get replaced by others, etc. so see the sensations as general "indicators" that stuff is going on, and one of those indications might be necessary changes you have to do yourself. e.g. change your diet.
3. Emotional stuff - this is already touched on above but because of how most of us are limited by our own beliefs and emotions (even if we might feel like we're not), this requires some special mention. Meditation is a powerful tool for developing yourself, but it requires that one investigates one's own emotions, beliefs, or lack of them, or resistance to them, or desires for whatever. Delving deep will reveal more layers (and there's usually tons of layers) of even completely unconscious limitations we place on ourselves, even if based on reasonable-sounding motivations e.g. being cautious is wise - but with the wrong motivation, the intention of self-protective cautiousness is contaminated with resistance to new experiences and weighed down to existing limiting patterns of thought (e.g. linear thinking, step 1, then 2, then 3) - which will cause us intense discomfort when experiences that can't be processed that way, comes in. Emotions can be useful powerful engines for various experiences and non-physical abilities, but because we are so unaware of how our own emotions (hidden or not) affect us, we often get frustrated with trying to break through and progress and understand new experiences in mediation.
The point is that the desirable transforming effects of mediation, can be severely limited by our own emotions, if we don't delve deep and uncover hidden beliefs / concepts and hidden emotions in order to understand, master, and perhaps replace less useful ones with more useful ones. The powerful potential of meditation is opened much more to you.